Quantum Nuclear Magnets and Superfluid 4He in Nanopores

小行星9802050 该项目研究正负自旋温度下的量子核磁体。这些研究将主要在亚微开尔文自旋温度下进行，使用佛罗里达大学微开尔文实验室的强大核退磁低温恒温器，该实验室是美国仅有的两个此类设施之一。本研究将探讨钇和氘氚及其合金中自旋I=1/2的核。它们的磁性将使用交流磁化率技术和近零场核磁共振超导量子干涉装置进行研究。这些核磁体有望成为量子偶极磁体和随机偶极量子磁体在实验室中的第一个实现。这些研究将解决磁性中涉及高度量子力学自旋波动的基本问题。该项目的一个重要方面是推进博士后助理，研究生和本科生的教育参与实验在一个独特的国家设施。 本项目研究正负自旋温度下的量子核磁体。这些研究将主要在亚微开尔文自旋温度下进行，使用佛罗里达大学微开尔文实验室的强大核退磁低温恒温器，该实验室是美国仅有的两个此类设施之一。本研究将探讨钇和氘氚及其合金中自旋I=1/2的核。它们的磁性将使用交流磁化率技术和近零场核磁共振超导量子干涉装置进行研究。这些核磁体有望成为量子偶极磁体和随机偶极量子磁体在实验室中的第一个实现。这些研究将解决磁性中涉及高度量子力学自旋波动的基本问题。该项目的一个重要方面是促进博士后研究生，研究生和本科生在一个独特的国家设施参与实验的教育。 ***

9802050 Takano This project investigates quantum nuclear magnets at positive and negative spin temperatures. The studies will be performed primarily at sub-microKelvin spin temperature using the powerful nuclear demagnetization cryostats in the MicroKelvin Laboratory of the University of Florida, one of only two such facilities in the United States. The research will investigate the spin I=1/2 nuclei in yttrium and deuterium hydrides and their alloys. Their magnetic properties will be studied using ac susceptibility techniques and near-zero-field nuclear magnetic resonance employing superconducting quantum interference devices. These nuclear magnets promise to be the first realizations on the laboratory of a quantum dipolar magnet and random dipolar quantum magnets. The studies will address fundamental issues in magnetism involving fluctuations of highly quantum mechanical spins. A significant aspect of the project is to advance the education of postdoctoral associates, graduate students, and undergraduate students involved in experiments at a unique national facility. %%% This project investigates quantum nuclear magnets at positive and negative spin temperatures. The studies will be performed primarily at sub-microKelvin spin temperature using the powerful nuclear demagnetization cryostats in the MicroKelvin Laboratory of the University of Florida, one of only two such facilities in the United States. The research will investigate the spin I=1/2 nuclei in yttrium and deuterium hydrides and their alloys. Their magnetic properties will be studied using ac susceptibility techniques and near-zero-field nuclear magnetic resonance employing superconducting quantum interference devices. These nuclear magnets promise to be the first realizations on the laboratory of a quantum dipolar magnet and random dipolar quantum magnets. The studies will address fundamental issues in magnetism involving fluctuations of highly quantum mechanical spins. A significant aspe ct of the project is to advance the education of postdoctoral associates, graduate students, and undergraduate students involved in experiments at a unique national facility. ***